openvpn: make it compatible with OpenBSD and add some improvements

pull/151/head
Jérémy Dubois 10 months ago
parent 0cbdda840d
commit 981128dc17
  1. 2
      CHANGELOG.md
  2. 13
      openvpn/README.md
  3. 0
      openvpn/files/check_openvpn_debian.pl
  4. 215
      openvpn/files/check_openvpn_openbsd.pl
  5. 8
      openvpn/handlers/main.yml
  6. 296
      openvpn/tasks/debian.yml
  7. 288
      openvpn/tasks/main.yml
  8. 235
      openvpn/tasks/openbsd.yml
  9. 1
      openvpn/templates/ovpn.conf.j2
  10. 3
      openvpn/templates/server.conf.j2

@ -18,6 +18,8 @@ The **patch** part changes is incremented if multiple releases happen the same m
### Changed
* openvpn: make it compatible with OpenBSD and add some improvements
### Fixed
### Removed

@ -7,6 +7,16 @@ Install and configure OpenVPN, based on [our HowtoOpenVPN wiki](https://wiki.evo
Everything is in the `tasks/main.yml` file.
Some manual actions are requested at the end of the playbook, to do before finishing the playbook.
Here is a copy of what is requested :
* You have to manually create the CA on the server with `shellpki init server.example.com`. The command will ask you to create a password, and will ask you again to give the same one several times.
* You have to manually generate the CRL on the server with `openssl ca -gencrl -keyfile /etc/shellpki/cakey.key -cert /etc/shellpki/cacert.pem -out /etc/shellpki/crl.pem -config /etc/shellpki/openssl.cnf`. The previously created password will be asked.
* You have to manually create the server's certificate with `shellpki create server.example.com`.
* You have to adjust the config file `/etc/openvpn/server.conf` for the following parameters : `local` (to check), `cert` (to check), `key` (to add), `server` (to check), `push` (to complete if needed).
* Finally, you can (re)start the OpenVPN service with `systemctl restart openvpn@server.service` on Debian, or `rcctl restart openvpn` on OpenBSD.
Then, you can use `shellpki` to generate client certificates.
## Variables
* `openvpn_lan`: network to use for OpenVPN
@ -15,5 +25,4 @@ Some manual actions are requested at the end of the playbook, to do before finis
## TODO
* Make it compatible with OpenBSD
* See TODO tasks in tasks/main.yml
* See TODO tasks in tasks/*.yml

@ -0,0 +1,215 @@
#!/usr/bin/perl -w
#######################################################################
#
# Copyright (c) 2007 Jaime Gascon Romero <jgascon@gmail.com>
#
# License Information:
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# $Id: check_openvpn.pl,v 1.1 2014/09/29 08:39:24 rdessort Exp $
# $Revision: 1.1 $
# Home Site: http://emergeworld.blogspot.com/
# #####################################################################
use diagnostics;
use strict;
use Net::Telnet ();
use Getopt::Long qw(:config no_ignore_case);
use vars qw($PROGNAME $VERSION);
use lib "/usr/local/libexec/nagios/";
use utils qw(%ERRORS);
$PROGNAME = "check_openvpn";
$VERSION = '$Revision: 1.1 $';
$ENV{'PATH'}='';
$ENV{'BASH_ENV'}='';
$ENV{'ENV'}='';
my ($opt_h, $opt_H, $opt_p, $opt_P, $opt_t, $opt_i, $opt_n, $opt_c, $opt_w, $opt_C, $opt_r);
sub print_help ();
sub print_usage ();
GetOptions
("h" => \$opt_h, "help" => \$opt_h,
"H=s" => \$opt_H, "host=s" => \$opt_H,
"p=i" => \$opt_p, "port=i" => \$opt_p,
"P=s" => \$opt_P, "password=s" => \$opt_P,
"t=i" => \$opt_t, "timeout=i" => \$opt_t,
"i" => \$opt_i, "ip" => \$opt_i,
"n" => \$opt_n, "numeric" => \$opt_n,
"c" => \$opt_c, "critical" => \$opt_c,
"w" => \$opt_w, "warning" => \$opt_w,
"C=s" => \$opt_C, "common_name=s" => \$opt_C,
"r=s" => \$opt_r, "remote_ip=s" => \$opt_r,
) or exit $ERRORS{'UNKNOWN'};
# default values
unless ( defined $opt_t ) {
$opt_t = 10;
}
if ($opt_h) {print_help(); exit $ERRORS{'OK'};}
if ( ! defined($opt_H) || ! defined($opt_p) ) {
print_usage();
exit $ERRORS{'UNKNOWN'}
}
my @lines;
my @clients;
my @clients_ip;
my $t;
eval {
$t = new Net::Telnet (Timeout => $opt_t,
Port => $opt_p,
Prompt => '/END$/'
);
$t->open($opt_H);
if ( defined $opt_P ) {
$t->waitfor('/ENTER PASSWORD:$/');
$t->print($opt_P);
}
$t->waitfor('/^$/');
@lines = $t->cmd("status 2");
$t->close;
};
if ($@) {
print "OpenVPN Critical: Can't connect to server\n";
exit $ERRORS{'CRITICAL'};
}
if (defined $opt_i || defined $opt_r) {
foreach (@lines) {
if ($_ =~ /CLIENT_LIST,.*,(\d+\.\d+\.\d+\.\d+):\d+,/) {
push @clients_ip, $1;
}
}
if (defined $opt_i) {
print "OpenVPN OK: "."@clients_ip ";
exit $ERRORS{'OK'};
} elsif (defined $opt_r) {
if ( ! grep /\b$opt_r\b/, @clients_ip) {
if (defined $opt_c) {
print "OpenVPN CRITICAL: $opt_r don't found";
exit $ERRORS{'CRITICAL'};
} else {
print "OpenVPN WARNING: $opt_r don't found";
exit $ERRORS{'WARNING'};
}
}
print "OpenVPN OK: "."@clients_ip ";
exit $ERRORS{'OK'};
}
}
foreach (@lines) {
if ($_ =~ /CLIENT_LIST,(.*),\d+\.\d+\.\d+\.\d+:\d+,/) {
push @clients, $1;
}
}
if (defined $opt_C) {
if ( ! grep /\b$opt_C\b/, @clients) {
if (defined $opt_c) {
print "OpenVPN CRITICAL: $opt_C don't found";
exit $ERRORS{'CRITICAL'};
} else {
print "OpenVPN WARNING: $opt_C don't found";
exit $ERRORS{'WARNING'};
}
}
}
if (defined $opt_n) {
print "OpenVPN OK: ".@clients." connected clients.";
exit $ERRORS{'OK'};
}
print "OpenVPN OK: "."@clients ";
exit $ERRORS{'OK'};
#######################################################################
###### Subroutines ####################################################
sub print_usage() {
print "Usage: $PROGNAME -H | --host <IP or hostname> -p | --port <port number> [-P | --password] <password> [-t | --timeout] <timeout in seconds>
[-i | --ip] [-n | --numeric] [-C | --common_name] <common_name> [-r | --remote_ip] <remote_ip> [-c | --critical] [-w | --warning]\n\n";
print " $PROGNAME [-h | --help]\n";
}
sub print_help() {
print "$PROGNAME $VERSION\n\n";
print "Copyright (c) 2007 Jaime Gascon Romero
Nagios plugin to check the clients connected to a openvpn server.
";
print_usage();
print "
-H | --host
IP address or hostname of the openvpn server.
-p | --port
Management port interface of the openvpn server.
-P | --password
Password for the management interface of the openvpn server.
-t | --timeout
Timeout for the connection attempt. Optional, default 10 seconds.
Optional parameters
===================
-i | --ip
Prints the IP address of the remote client instead of the common name.
-n | --numeric
Prints the number of clients connected to the openvpn server.
Matching Parameters
===================
-C | --common_name
The common name, as it is specified in the client certificate, who is wanted to check.
-r | --remote_ip
The client remote ip address who is wanted to check.
-c | --critical
Exits with CRITICAL status if the client specified by the common name or the remote ip address is not connected.
-w | --warning
Exits with WARNING status if the client specified by the common name or the remote ip address is not connected.
Other Parameters
================
-h | --help
Show this help.
";
}
# vim:sts=2:sw=2:ts=2:et

@ -4,3 +4,11 @@
service:
name: nagios-nrpe-server
state: restarted
- name: restart nrpe
service:
name: nrpe
state: restarted
- name: reload packetfilter
command: pfctl -f /etc/pf.conf

@ -0,0 +1,296 @@
---
- name: Install OpenVPN
apt:
name: openvpn
- name: Delete unwanted OpenVPN folders
file:
state: absent
dest: "/etc/openvpn/{{ item }}"
with_items:
- client
- server
- name: Clone shellpki repo
git:
repo: "https://gitea.evolix.org/evolix/shellpki.git"
dest: /root/shellpki
- name: Create the shellpki user
user:
name: shellpki
system: yes
create_home: no
home: "/etc/shellpki"
shell: "/usr/sbin/nologin"
- name: Create /etc/shellpki
file:
dest: "/etc/shellpki"
mode: "0755"
owner: shellpki
group: shellpki
state: directory
- include_role:
name: evolix/remount-usr
- name: Copy shellpki files
copy:
src: "{{ item.source }}"
dest: "{{ item.destination }}"
remote_src: yes
with_items:
- { source: "/root/shellpki/openssl.cnf", destination: "/etc/shellpki/openssl.cnf" }
- { source: "/root/shellpki/shellpki", destination: "/usr/local/sbin/shellpki" }
- include_role:
name: evolix/remount-usr
- name: Change files permissions
file:
dest: "{{ item.dest }}"
mode: "{{ item.mode }}"
owner: "{{ item.owner }}"
group: "{{ item.group }}"
with_items:
- { dest: "/etc/shellpki/openssl.cnf", mode: "0640", owner: "shellpki", group: "shellpki" }
- { dest: "/usr/local/sbin/shellpki", mode: "0755", owner: "root", group: "root" }
- name: Delete local shellpki repo
file:
state: absent
dest: "/root/shellpki"
- name: Add sudo rights
lineinfile:
dest: "/etc/sudoers.d/shellpki"
regexp: '/usr/local/sbin/shellpki'
line: "%shellpki ALL = (root) /usr/local/sbin/shellpki"
create: yes
mode: "0400"
owner: root
group: root
validate: 'visudo -cf %s'
- name: Deploy OpenVPN client config template
template:
src: "ovpn.conf.j2"
dest: "/etc/shellpki/ovpn.conf"
mode: "0600"
owner: shellpki
group: shellpki
- name: Generate dhparam
command: "openssl dhparam -out /etc/shellpki/dh2048.pem 2048"
- include_role:
name: evolix/remount-usr
- name: Fix CRL rights in shellpki command
lineinfile:
dest: "/usr/local/sbin/shellpki"
regexp: '{{ item.regexp }}'
insertafter: "{{ item.insertafter }}"
line: "{{ item.line }}"
with_items:
- { regexp: '^ chmod 644 /etc/shellpki/crl.pem$', line: " chmod 644 /etc/shellpki/crl.pem", insertafter: '^ chmod 640 "\${CACERT}"$' }
- { regexp: '^ chmod 755 /etc/shellpki/$', line: " chmod 755 /etc/shellpki/", insertafter: '^ chmod 644 /etc/shellpki/crl.pem$' }
- name: Deploy OpenVPN server config
template:
src: "server.conf.j2"
dest: "/etc/openvpn/server.conf"
mode: "0600"
owner: root
group: root
- name: Is minifirewall installed ?
stat:
path: "/etc/default/minifirewall"
check_mode: no
changed_when: false
register: minifirewall_config
- name: Retrieve the default interface
shell: "grep '^INT=' /etc/default/minifirewall | cut -d\\' -f 2"
check_mode: no
changed_when: false
register: minifirewall_int
when: minifirewall_config.stat.exists
- name: Add minifirewall rule in config file
lineinfile:
dest: "/etc/default/minifirewall"
line: "{{ item }}"
with_items:
- "# OpenVPN"
- "/sbin/iptables -t nat -A POSTROUTING -s {{ openvpn_lan }}/{{ openvpn_netmask_cidr }} -o $INT -j MASQUERADE"
when: minifirewall_config.stat.exists
- name: Activate minifirewall rule
iptables:
table: nat
chain: POSTROUTING
source: "{{ openvpn_lan }}/{{ openvpn_netmask_cidr }}"
out_interface: "{{ minifirewall_int.stdout }}"
jump: MASQUERADE
when: minifirewall_config.stat.exists
- name: Add 1194/udp OpenVPN port to public services in minifirewall
replace:
dest: "/etc/default/minifirewall"
regexp: "^SERVICESUDP1='(.*)?'$"
replace: "SERVICESUDP1='\\1 1194'"
backup: yes
when: minifirewall_config.stat.exists
- name: Activate minifirewall rule for IPv4
iptables:
chain: INPUT
protocol: udp
destination_port: "1194"
jump: ACCEPT
ip_version: ipv4
when: minifirewall_config.stat.exists
- name: Activate minifirewall rule for IPv6
iptables:
chain: INPUT
protocol: udp
destination_port: "1194"
jump: ACCEPT
ip_version: ipv6
when: minifirewall_config.stat.exists
- name: Enable forwarding
sysctl:
name: net.ipv4.ip_forward
value: "1"
sysctl_file: "/etc/sysctl.d/openvpn.conf"
- name: Generate a password for the management interface
set_fact:
management_pwd: "{{ lookup('password', '/dev/null length=15 chars=ascii_letters,digits') }}"
- name: Set the management password
copy:
dest: "/etc/openvpn/management-pwd"
content: "{{ management_pwd }}"
mode: "0600"
owner: root
group: root
- name: Enable openvpn service
systemd:
name: "openvpn@server.service"
enabled: yes
- name: Is NRPE installed ?
stat:
path: "/etc/nagios/nrpe.d/evolix.cfg"
check_mode: no
changed_when: false
register: nrpe_evolix_config
- name: Install NRPE check dependencies
apt:
name: libnet-telnet-perl
when: nrpe_evolix_config.stat.exists
- include_role:
name: evolix/remount-usr
- name: Install OpenVPN NRPE check
copy:
src: "files/check_openvpn_debian.pl"
dest: "/usr/local/lib/nagios/plugins/check_openvpn"
mode: "0755"
owner: root
group: nagios
when: nrpe_evolix_config.stat.exists
- name: Configure NRPE OpenVPN check
lineinfile:
dest: "/etc/nagios/nrpe.d/evolix.cfg"
regexp: '^command\[check_openvpn\]='
line: "command[check_openvpn]=/usr/local/lib/nagios/plugins/check_openvpn -H 127.0.0.1 -p 1195 -P {{ management_pwd }}"
notify: restart nagios-nrpe-server
when: nrpe_evolix_config.stat.exists
- include_role:
name: evolix/remount-usr
- name: Install OpenVPN certificates NRPE check
copy:
src: "files/check_openvpn_certificates.sh"
dest: "/usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
mode: "0755"
owner: root
group: nagios
when: nrpe_evolix_config.stat.exists
- name: Add sudo rights for NRPE check
lineinfile:
dest: "/etc/sudoers.d/openvpn"
regexp: 'check_openvpn_certificates.sh'
line: "nagios ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
create: yes
mode: "0400"
owner: root
group: root
validate: 'visudo -cf %s'
when: nrpe_evolix_config.stat.exists
- name: Configure NRPE certificates check
lineinfile:
dest: "/etc/nagios/nrpe.d/evolix.cfg"
regexp: '^command\[check_openvpn_certificates\]='
line: "command[check_openvpn_certificates]=sudo /usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
notify: restart nagios-nrpe-server
when: nrpe_evolix_config.stat.exists
# BEGIN TODO : Get this script from master branch when cloning it at the beginning when dev branch is merged with master (this script is currently not available on master branch)
- name: Clone dev branch of shellpki repo
git:
repo: "https://gitea.evolix.org/evolix/shellpki.git"
dest: /root/shellpki-dev
version: dev
- include_role:
name: evolix/remount-usr
- name: Copy shellpki script
copy:
src: "/root/shellpki-dev/cert-expirations.sh"
dest: "/usr/share/scripts/cert-expirations.sh"
mode: "0700"
owner: root
group: root
remote_src: yes
- name: Delete local shellpki-dev repo
file:
state: absent
dest: "/root/shellpki-dev"
# END TODO
- name: Install cron to warn about certificates expiration
cron:
name: "OpenVPN certificates expiration"
special_time: monthly
job: '/usr/share/scripts/cert-expirations.sh | mail -E -s "PKI VPN {{ ansible_hostname }} : recapitulatif expirations" {{ client_email }}'
- name: Warn the user about command to execute manually
pause:
prompt: |
/!\ WARNING /!\
You have to manually create the CA on the server with "shellpki init {{ ansible_fqdn }}". The command will ask you to create a password, and will ask you again to give the same one several times.
You have to manually generate the CRL on the server with "openssl ca -gencrl -keyfile /etc/shellpki/cakey.key -cert /etc/shellpki/cacert.pem -out /etc/shellpki/crl.pem -config /etc/shellpki/openssl.cnf". The previously created password will be asked.
You have to manually create the server's certificate with "shellpki create {{ ansible_fqdn }}".
You have to adjust the config file "/etc/openvpn/server.conf" for the following parameters : local (to check), cert (to check), key (to add), server (to check), push (to complete if needed).
Finally, you can (re)start the OpenVPN service with "systemctl restart openvpn@server.service".
Press enter to exit when it's done.

@ -1,285 +1,15 @@
---
- name: This role is only compatible with Debian
- name: System compatibility checks
assert:
that: "ansible_distribution == 'Debian'"
msg: "Only compatible with Debian"
that: "ansible_distribution == 'Debian' or ansible_distribution == 'OpenBSD'"
msg: "Only compatible with Debian and OpenBSD"
- name: Install OpenVPN
apt:
name: openvpn
- name: Include Debian version
include: debian.yml
when: ansible_distribution == "Debian"
- name: Delete unwanted OpenVPN folders
file:
state: absent
path: "/etc/openvpn/{{ item }}"
with_items:
- client
- server
- name: Clone shellpki repo
git:
repo: "https://gitea.evolix.org/evolix/shellpki.git"
dest: /root/shellpki
- name: Create the shellpki user
user:
name: shellpki
system: yes
create_home: no
home: "/etc/shellpki"
shell: "/usr/sbin/nologin"
- name: Create /etc/shellpki
file:
path: "/etc/shellpki"
state: directory
- include_role:
name: evolix/remount-usr
- name: Copy shellpki files
copy:
src: "{{ item.source }}"
dest: "{{ item.destination }}"
remote_src: yes
with_items:
- { source: "/root/shellpki/openssl.cnf", destination: "/etc/shellpki/openssl.cnf" }
- { source: "/root/shellpki/shellpki", destination: "/usr/local/sbin/shellpki" }
- include_role:
name: evolix/remount-usr
- name: Change files permissions
file:
path: "{{ item.path }}"
mode: "{{ item.mode }}"
with_items:
- { path: "/etc/shellpki/openssl.cnf", mode: "0640" }
- { path: "/usr/local/sbin/shellpki", mode: "0755" }
- name: Delete local shellpki repo
file:
state: absent
path: "/root/shellpki"
- name: Change directory owner
file:
path: "/etc/shellpki"
owner: shellpki
recurse: yes
state: directory
- name: Add sudo rights
lineinfile:
dest: "/etc/sudoers.d/shellpki"
regexp: '/usr/local/sbin/shellpki'
line: "%shellpki ALL = (root) /usr/local/sbin/shellpki"
create: yes
validate: 'visudo -cf %s'
- name: Deploy OpenVPN client config template
template:
src: "ovpn.conf.j2"
dest: "/etc/shellpki/ovpn.conf"
- name: Generate dhparam
command: "openssl dhparam -out /etc/shellpki/dh2048.pem 2048"
- include_role:
name: evolix/remount-usr
- name: Fix CRL rights in shellpki command
lineinfile:
path: "/usr/local/sbin/shellpki"
regexp: '{{ item.regexp }}'
insertafter: "{{ item.insertafter }}"
line: "{{ item.line }}"
with_items:
- { regexp: '^ chmod 644 /etc/shellpki/crl.pem$', line: " chmod 644 /etc/shellpki/crl.pem", insertafter: '^ chmod 640 "\${CACERT}"$' }
- { regexp: '^ chmod 755 /etc/shellpki/$', line: " chmod 755 /etc/shellpki/", insertafter: '^ chmod 644 /etc/shellpki/crl.pem$' }
- name: Deploy OpenVPN server config
template:
src: "server.conf.j2"
dest: "/etc/openvpn/server.conf"
- name: Is minifirewall installed ?
stat:
path: "/etc/default/minifirewall"
check_mode: no
register: minifirewall_config
- name: Retrieve the default interface
shell: "grep '^INT=' /etc/default/minifirewall | cut -d\\' -f 2"
check_mode: no
changed_when: false
register: minifirewall_int
- name: Add minifirewall rule in config file
lineinfile:
path: "/etc/default/minifirewall"
line: "{{ item }}"
with_items:
- "# OpenVPN"
- "/sbin/iptables -t nat -A POSTROUTING -s {{ openvpn_lan }}/{{ openvpn_netmask_cidr }} -o $INT -j MASQUERADE"
when: minifirewall_config.stat.exists
- name: Activate minifirewall rule
iptables:
table: nat
chain: POSTROUTING
source: "{{ openvpn_lan }}/{{ openvpn_netmask_cidr }}"
out_interface: "{{ minifirewall_int.stdout }}"
jump: MASQUERADE
when: minifirewall_config.stat.exists
- name: Add 1194/udp OpenVPN port to public services in minifirewall
replace:
path: "/etc/default/minifirewall"
regexp: "^SERVICESUDP1='(.*)?'$"
replace: "SERVICESUDP1='\\1 1194'"
backup: yes
when: minifirewall_config.stat.exists
- name: Activate minifirewall rule for IPv4
iptables:
chain: INPUT
protocol: udp
destination_port: "1194"
jump: ACCEPT
ip_version: ipv4
when: minifirewall_config.stat.exists
- name: Activate minifirewall rule for IPv6
iptables:
chain: INPUT
protocol: udp
destination_port: "1194"
jump: ACCEPT
ip_version: ipv6
when: minifirewall_config.stat.exists
- name: Enable forwarding
sysctl:
name: net.ipv4.ip_forward
value: "1"
sysctl_file: "/etc/sysctl.d/openvpn.conf"
- name: Generate a password for the management interface
set_fact:
management_pwd: "{{ lookup('password', '/dev/null length=15 chars=ascii_letters,digits') }}"
- name: Set the management password
copy:
dest: "/etc/openvpn/management-pwd"
content: "{{ management_pwd }}"
- name: Enable openvpn service
systemd:
name: "openvpn@server.service"
enabled: yes
- name: Is NRPE installed ?
stat:
path: "/etc/nagios/nrpe.d/evolix.cfg"
check_mode: no
register: nrpe_evolix_config
- name: Install NRPE check dependencies
apt:
name: libnet-telnet-perl
when: nrpe_evolix_config.stat.exists
- include_role:
name: evolix/remount-usr
- name: Install OpenVPN NRPE check
copy:
src: "files/check_openvpn.pl"
dest: "/usr/local/lib/nagios/plugins/check_openvpn"
mode: "0755"
owner: root
group: nagios
when: nrpe_evolix_config.stat.exists
- name: Add NRPE check
lineinfile:
dest: "/etc/nagios/nrpe.d/evolix.cfg"
regexp: '^command\[check_openvpn\]='
line: "command[check_openvpn]=/usr/local/lib/nagios/plugins/check_openvpn -H 127.0.0.1 -p 1195 -P {{ management_pwd }}"
notify: restart nagios-nrpe-server
when: nrpe_evolix_config.stat.exists
- include_role:
name: evolix/remount-usr
- name: Install OpenVPN certificates NRPE check
copy:
src: "files/check_openvpn_certificates.sh"
dest: "/usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
mode: "0755"
owner: root
group: nagios
when: nrpe_evolix_config.stat.exists
- name: Add sudo rights for NRPE check
lineinfile:
dest: "/etc/sudoers.d/openvpn"
regexp: 'check_openvpn_certificates.sh'
line: "nagios ALL=NOPASSWD: /usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
create: yes
validate: 'visudo -cf %s'
when: nrpe_evolix_config.stat.exists
- name: Add NRPE check
lineinfile:
dest: "/etc/nagios/nrpe.d/evolix.cfg"
regexp: '^command\[check_openvpn_certificates\]='
line: "command[check_openvpn_certificates]=sudo /usr/local/lib/nagios/plugins/check_openvpn_certificates.sh"
notify: restart nagios-nrpe-server
when: nrpe_evolix_config.stat.exists
# BEGIN TODO : Get this script from master branch when cloning it at the beginning when dev branch is merged with master (this script is currently not available on master branch)
- name: Clone dev branch of shellpki repo
git:
repo: "https://gitea.evolix.org/evolix/shellpki.git"
dest: /root/shellpki-dev
version: dev
- include_role:
name: evolix/remount-usr
- name: Copy shellpki script
copy:
src: "/root/shellpki-dev/cert-expirations.sh"
dest: "/usr/share/scripts/cert-expirations.sh"
mode: "0700"
# owner: root
# group: root
remote_src: yes
- name: Delete local shellpki-dev repo
file:
state: absent
path: "/root/shellpki-dev"
# END TODO
- name: Install cron to warn about certificates expiration
cron:
name: "OpenVPN certificates expiration"
special_time: monthly
job: '/usr/share/scripts/cert-expirations.sh | mail -E -s "PKI VPN {{ ansible_hostname }} : recapitulatif expirations" {{ client_email }}'
- name: Warn the user about command to execute manually
pause:
prompt: |
/!\ WARNING /!\
You have to manually create the CA on the server with "shellpki init {{ ansible_fqdn }}". The command will ask you to create a password, and will ask you again to give the same one several times.
You have to manually generate the CRL on the server with "openssl ca -gencrl -keyfile /etc/shellpki/cakey.key -cert /etc/shellpki/cacert.pem -out /etc/shellpki/crl.pem -config /etc/shellpki/openssl.cnf". The previously created password will be asked
You have to manually create the server's certificate with "shellpki create {{ ansible_fqdn }}"
You have to adjuste the config file "/etc/openvpn/server.conf" for the following parameters : local (to check), cert (to check), key (to add), server (to check), push (to complete if needed).
Finally, you can (re)start the OpenVPN service with "systemctl restart openvpn@server.service"
Press enter to exit when it's done.
- name: Include OpenBSD version
include: openbsd.yml
when: ansible_distribution == "OpenBSD"

@ -0,0 +1,235 @@
---
- name: Install OpenVPN
openbsd_pkg:
name: openvpn--
when: ansible_distribution == 'OpenBSD'
- name: Create /etc/openvpn
file:
dest: "/etc/openvpn"
state: directory
owner: root
group: wheel
mode: "0755"
- name: Clone shellpki repo
git:
repo: "https://gitea.evolix.org/evolix/shellpki.git"
dest: /root/shellpki
- name: Create the shellpki user
user:
name: _shellpki
system: yes
create_home: no
home: "/etc/shellpki"
shell: "/sbin/nologin"
- name: Create /etc/shellpki
file:
dest: "/etc/shellpki"
state: directory
owner: _shellpki
group: _shellpki
mode: "0755"
- name: Copy shellpki files
copy:
src: "{{ item.source }}"
dest: "{{ item.destination }}"
remote_src: yes
with_items:
- { source: "/root/shellpki/openssl.cnf", destination: "/etc/shellpki/openssl.cnf" }
- { source: "/root/shellpki/shellpki", destination: "/usr/local/sbin/shellpki" }
- name: Change files permissions
file:
dest: "{{ item.dest }}"
mode: "{{ item.mode }}"
owner: "{{ item.owner }}"
group: "{{ item.group }}"
with_items:
- { dest: "/etc/shellpki/openssl.cnf", mode: "0640", owner: "_shellpki", group: "_shellpki"}
- { dest: "/usr/local/sbin/shellpki", mode: "0755", owner: "root", group: "wheel" }
- name: Delete local shellpki repo
file:
state: absent
dest: "/root/shellpki"
- name: Add sudo rights
lineinfile:
dest: "/etc/sudoers"
regexp: '/usr/local/sbin/shellpki'
line: "%_shellpki ALL = (root) /usr/local/sbin/shellpki"
validate: 'visudo -cf %s'
- name: Deploy OpenVPN client config template
template:
src: "ovpn.conf.j2"
dest: "/etc/shellpki/ovpn.conf"
mode: "0640"
owner: _shellpki
group: _shellpki
- name: Generate dhparam
command: "openssl dhparam -out /etc/shellpki/dh2048.pem 2048"
- name: Fix CRL rights in shellpki command
lineinfile:
dest: "/usr/local/sbin/shellpki"
regexp: '{{ item.regexp }}'
insertafter: "{{ item.insertafter }}"
line: "{{ item.line }}"
with_items:
- { regexp: '^ chmod 644 /etc/shellpki/crl.pem$', line: " chmod 644 /etc/shellpki/crl.pem", insertafter: '^ chmod 640 "\${CACERT}"$' }
- { regexp: '^ chmod 755 /etc/shellpki/$', line: " chmod 755 /etc/shellpki/", insertafter: '^ chmod 644 /etc/shellpki/crl.pem$' }
- name: Deploy OpenVPN server config
template:
src: "server.conf.j2"
dest: "/etc/openvpn/server.conf"
mode: "0600"
owner: root
group: wheel
- name: Configure PacketFilter
lineinfile:
dest: "/etc/pf.conf"
line: "{{ item }}"
validate: 'pfctl -nf %s'
notify: reload packetfilter
with_items:
- "# OpenVPN"
- "pass in quick on $ext_if proto udp from any to self port 1194"
- name: Create a cron to rotate the logs
cron:
name: "OpenVPN logs rotation"
weekday: "6"
hour: "4"
minute: "0"
job: "cp /var/log/openvpn.log /var/log/openvpn.log.$(date +\\%F) && echo \"$(date +\\%F' '\\%R) - logfile turned over via cron\" > /var/log/openvpn.log && gzip /var/log/openvpn.log.$(date +\\%F) && find /var/log/ -type f -name \"openvpn.log.*\" -mtime +365 -exec rm {} \\+"
- name: Generate a password for the management interface
set_fact:
management_pwd: "{{ lookup('password', '/dev/null length=15 chars=ascii_letters,digits') }}"
- name: Set the management password
copy:
dest: "/etc/openvpn/management-pwd"
content: "{{ management_pwd }}"
mode: "0600"
owner: root
group: wheel
- name: Enable openvpn service
service:
name: openvpn
enabled: yes
- name: Set openvpn flags
lineinfile:
dest: /etc/rc.conf.local
regexp: "^openvpn_flags="
line: "openvpn_flags=--daemon --config /etc/openvpn/server.conf"
create: yes
- name: Is NRPE installed ?
stat:
path: "/etc/nrpe.d/evolix.cfg"
check_mode: no
register: nrpe_evolix_config
- name: Install NRPE check dependencies
openbsd_pkg:
name: p5-Net-Telnet
when: nrpe_evolix_config.stat.exists
- name: Install OpenVPN NRPE check
copy:
src: "files/check_openvpn_openbsd.pl"
dest: "/usr/local/libexec/nagios/plugins/check_openvpn.pl"
mode: "0755"
owner: root
group: wheel
when: nrpe_evolix_config.stat.exists
- name: Configure NRPE OpenVPN check
lineinfile:
dest: "/etc/nrpe.d/zzz_evolix.cfg"
regexp: '^command\[check_openvpn\]='
line: "command[check_openvpn]=/usr/local/libexec/nagios/plugins/check_openvpn.pl -H 127.0.0.1 -p 1195 -P {{ management_pwd }}"
create: yes
mode: "0644"
owner: root
group: wheel
notify: restart nrpe
when: nrpe_evolix_config.stat.exists
- name: Install OpenVPN certificates NRPE check
copy:
src: "files/check_openvpn_certificates.sh"
dest: "/usr/local/libexec/nagios/plugins/check_openvpn_certificates.sh"
mode: "0755"
owner: root
group: wheel
when: nrpe_evolix_config.stat.exists
- name: Add doas rights for NRPE check
lineinfile:
dest: "/etc/doas.conf"
regexp: 'check_openvpn_certificates.sh'
line: "permit nopass _nrpe as root cmd /usr/local/libexec/nagios/plugins/check_openvpn_certificates.sh"
validate: 'doas -C %s'
when: nrpe_evolix_config.stat.exists
- name: Configure NRPE certificates check
lineinfile:
dest: "/etc/nrpe.d/evolix.cfg"
regexp: '^command\[check_openvpn_certificates\]='
line: "command[check_openvpn_certificates]=doas /usr/local/libexec/nagios/plugins/check_openvpn_certificates.sh"
notify: restart nrpe
when: nrpe_evolix_config.stat.exists
# BEGIN TODO : Get this script from master branch when cloning it at the beginning when dev branch is merged with master (this script is currently not available on master branch)
- name: Clone dev branch of shellpki repo
git:
repo: "https://gitea.evolix.org/evolix/shellpki.git"
dest: /root/shellpki-dev
version: dev
- name: Copy shellpki script
copy:
src: "/root/shellpki-dev/cert-expirations.sh"
dest: "/usr/share/scripts/cert-expirations.sh"
mode: "0700"
owner: root
group: wheel
remote_src: yes
- name: Delete local shellpki-dev repo
file:
state: absent
dest: "/root/shellpki-dev"
# END TODO
- name: Install cron to warn about certificates expiration
cron:
name: "OpenVPN certificates expiration"
special_time: monthly
job: '/usr/share/scripts/cert-expirations.sh | mail -E -s "PKI VPN {{ ansible_hostname }} : recapitulatif expirations" {{ client_email }}'
- name: Warn the user about command to execute manually
pause:
prompt: |
/!\ WARNING /!\
You have to manually create the CA on the server with "shellpki init {{ ansible_fqdn }}". The command will ask you to create a password, and will ask you again to give the same one several times.
You have to manually generate the CRL on the server with "openssl ca -gencrl -keyfile /etc/shellpki/cakey.key -cert /etc/shellpki/cacert.pem -out /etc/shellpki/crl.pem -config /etc/shellpki/openssl.cnf". The previously created password will be asked.
You have to manually create the server's certificate with "shellpki create {{ ansible_fqdn }}".
You have to adjust the config file "/etc/openvpn/server.conf" for the following parameters : local (to check), cert (to check), key (to add), server (to check), push (to complete if needed).
Finally, you can (re)start the OpenVPN service with "rcctl restart openvpn".
Press enter to exit when it's done.

@ -5,6 +5,7 @@ proto udp
remote {{ ansible_fqdn }} 1194
nobind
persist-key
persist-tun

@ -7,12 +7,15 @@ proto udp
dev tun
mode server
keepalive 10 120
tls-exit
cipher AES-256-GCM # AES
persist-key
persist-tun
ifconfig-pool-persist /etc/openvpn/ipp.txt
status /var/log/openvpn-status.log
log-append /var/log/openvpn.log

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